1.novice n．新手(beginner)

詞根記憶：nov(新)+ice(人)一新手

例：I helped my boss train the novices.

2.noxious a．有毒的，有害的(harmful, poisonous)

詞根記憶：nox(毒)+ious--有毒的

例：A shed behind the factory is filled with noxious chemicals.

3.nuclear a．核心的(center)；核子的，原子能的(atomic)

詞根記憶：nucle（核的）+ar--核心的；核子的

例：nuclear family核心家庭//nuclear weapon核武器

4.nucleon n．核子（a proton or neutron especially in the atomic nucleus)

詞根記憶：nucle(核的)+on(物)--核子

例：Great mass is synonymous with huge numbers of nucleons.

派生詞：nucleic(a.核的，核子的)

5.nucleotide n.核苷酸（any of various compounds consisting of a nucleoside combined with a phosphate group and forming the basic constituent of DNA and RNA)

例：nucleotide sequence核苷酸序列

6.nucleus n.[pl. nuclei]核，核心(a central or essential part around which other parts are gathered or grouped ;a core)

例：cell nuclei細胞核

7.nuisance n.討厭的人：麻煩事( one that is annoying, unpleasant, or obnoxious)

聯想記憶：討厭的人(nuisance)說什么都是廢話(nonsense)

例：This method allows for effective control of nuisance algae while leaving solar ponds as one of the cleanest technologies providing energy for human use.

8.numerator n.【數】分子：(the part of a fraction that is above the line and signifies the number to be divided by the denominator)

聯想記憶：numer(數)+ator--變化了產生新的數--分子

注意：denominator(n．分母)

例：What is the sum of the numerator and denominator of the original fraction?

9.nutrient n．營養物，滋養物質(substance serving as or providing nourishment)

詞根記憶：nutri（滋養）+ent(表物)--滋養物質

例：To maintain the nutrient s in the soil, corn and soybeans are often planted in a field in alternate years.

同根詞：nutritious(a．有營養的；滋養的)